A display device includes a display substrate comprising a plurality of pixels electrically connected to select lines and data lines; first connection pads disposed on an upper surface of the display substrate and electrically connected to the pixels; and second connection pads disposed on a surface of the display substrate that is different from the upper surface and electrically connected to the pixels, wherein the second connection pads are electrically separated from the first connection pads. This allows the area of a surface of a display substrate that can be occupied by a flexible printed circuit board attached thereto to be increased. As a result, the risk of an open-circuit of the wiring can be reduced, and the operational reliability of the device can be improved.